2272451221 has 12 divisors (see below), whose sum is σ = 2386924960. Its totient is φ = 2163241080.

The previous prime is 2272451197. The next prime is 2272451231. The reversal of 2272451221 is 1221542722.

It is not a de Polignac number, because 2272451221 - 2⁵ = 2272451189 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2272451221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2272451231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 101440 + ... + 121798.

Almost surely, 2^2272451221 is an apocalyptic number.

It is an amenable number.

2272451221 is a deficient number, since it is larger than the sum of its proper divisors (114473739).

2272451221 is a wasteful number, since it uses less digits than its factorization.

2272451221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20616 (or 20593 counting only the distinct ones).

The product of its digits is 4480, while the sum is 28.

The square root of 2272451221 is about 47670.2341194167. The cubic root of 2272451221 is about 1314.7147132281.

Adding to 2272451221 its reverse (1221542722), we get a palindrome (3493993943).

The spelling of 2272451221 in words is "two billion, two hundred seventy-two million, four hundred fifty-one thousand, two hundred twenty-one".